after years of very public denials, lance armstrong is now taking it all back. cyclist who was stripped of his 7 tour de france titles and just today an olympic medal admitted in an interview with oprah winfrey that he used performance enhancing drugs. we have more on what lance armstrong confessed. >> after a decade of deception, it's the moment many thought would never come. >> in all 7 of your tour de france victories, did you ever take banned substances or blood doping. >> yes. >>reporter: in an exclusive interview open the oprah winfrey network the great cyclist lance armstrong finally confessed to using banned substances to help him compete. >> my cocktail so to speak was only e p o. not a lot. transfusions and testosterone. >>reporter: armstrong apologized for his trail of li lies. >> all the fall and blame falls on me. >>reporter: cyclist former best friend and teammate frank andrew says armstrong attacked him for revving to the lie about his drug use. >> i got e-mail. trader rat. second happened cyclist. just ripped apart. >>reporter: while armstrong fu